Good Luck and congratulations on getting started with your blog.
You can visit this site to help with creating buttons for your rss feeds. RSS Buttons for Your Blog from TopRank Online Marketing Blog
You can select which buttons you want....and with one click it creates the code.
Once you cut and paste the code to your site, remember to edit the code and insert:
1. Your blog url
2. Your blog rss feed url
3. The name of your blog
You will see where to insert the above info in the code that is created.
Wish you the best!